I encounter the same problem, not on a multisite installation.
Wherever I navigate in the site, I'm bounced after an instant to home page.
Moreover, a cannot see the bar, nowhere.
I vas very happy about this plugin, since I need to insert a background music in a site, and I cannot find the way to.
Please, could you tell me what's the matter with Audiobar?

but as written before: i switched the single installation wordpress site from local apache to my host - and its bouncing me after a second back to my last post. the bar is also gone - no music anymore.

offline it still works fine! just after transfer the site: pow.

tried to de-install the plugin/ database/ cache offline to put it online again - same prob.